Dipper tooth



Patent Oei. e, 1923.

- EDWARD LoUIs PEMBEMON, or NEW Yonx, N. Y., AssIeNoa :ro THE moe swrrcn a MANUFAGTUBING COMPANY, or CARLISLE, PENNSYLVANIA, ,A eonroaarroN F PENNSYLVANIA.

Application led February To all/whom z't my concern:

.Be it known that I, EDWARD L. PEMBER- ToN, a citizen of the United States, residing at lNew York city, in the county of New VYork and State of New York, have invented certain new and useful lIm rovements 1n Dipper Teeth, of which the ollowing is a specification. v

This invention relates to teeth for excavatingdippers or shovels, or the like, .an object of the invention being to provlde` a tooth having improvedmeans for interlocking the point and base of the tooth, So as to resist or prevent relative movement thereof. `A further object of this invention is to provide'an improved dipper or shovel tooth comprising a point and a base connected to gether, which tooth will ybe strong and durable for withstanding efficiently the o shocks or strains 'to which it is subjected during use, and which at the Sametime will be relatively easy and inexpensive to manufacture. n o

' A further objectlof ythis invention' .1s to provide a dipper or shovel tooth comprising a base and a point connected together,.the point and base having an improved lug construction for securely interlocking the point and base together. A further object of this inventlon is to provide an improved shovel pointA adapted to beconnected to the base `member of the tooth, the point having inwardly .extending side lugs between which the baseiits. I

Other objects of this invention willY appear in the following description'and inthe a pended claims, reference being had 'to t e accompanying-drawings formlng a part of this specification, wherein like reference -characters indicate correspondin parte in the several views, and wherein ig. 1 is a longitudinal sectional elevation of a art of. an excavating dipper or `shovel an illustrating' a tooth lembodying this invention and connected thereto; Fig. 2 is a top plan -view of a tooth; Fig. 3 is a perspective view of the point: Fig. 4 is a perspective view of the base of the tooth; Fig. 5 is a perspective view of a somewhat modified form of point; and Fig. 6 is a perspective view of a some# what modified form of base of the tooth.

Y DIPPEE TOOTH.

16, 1923. Serial No. 819,331.

Before explaining lin detail the present 4 improvement and mode of operation thereof, I deslreto have it understood .that -the inG vention 1s not limited to the details of constructlon and arrangement of parts which are lllustrated in the accompanying drawings, since the invention is capable of other embodiments, and that `the which I 'employ isfor the purpose of descriptlonA and not of limitationf Inl thel construction illustrated in Figs. 1 to 4 lncluslve, it will be seen that the present lmproved dipper or shovel tooth comprises `awedgeshaped point 9 bifurcated to provide a pair of rearwardly extending jaws or phraseology ,l

members 10 and 11 forming a wedge-shaped recess therebetween for receiving the nose of the base of the tooth. The jaw 11 is tapered rearwardly to a suitable distance and is preferably provided with a straight horizontal extension12, the lower jaw in the present lnstance thus being preferably longer than the upper jaw. The jaws 10and 11 are connected together in spaced relation by means of a centralweb 13.

The base 14 of the tooth is bifrcated to provide a lower jaw 16 and an upper jaw or' shank 15 extending rearwardly thereof, the parts-15 and 16 thus forming a Space therebetween, into which the bottom 41 of a suitable dipper or shovel 40 fits. The b of the tooth is alsoprovided with a wed shaped nose 17,. which is Aslotted centra ly thereof to provide a recess 18, into which the wedge 13 is seated when the point and nose are assembled. Thel rear end of the *upper jaw 10 is preferably beveledy at 19 so` as to extend in prolongation of the upper face of the shank 15, as shown in Fig. 1.

In the form of tooth illustrated in Figs. 1 to 4 inclusive, it will be seen that the extension 12 of the lower jaw 11 is of substantially the same width throughout. and has substantially the same width and length as the lower jaw 16 of the base 14. `The extension 12 is provided with a pair of inwardly extending lugs 20 and 21, which are preferably cast integrally therewith land are preferably formed outwardly from the side edges of the memberY 12. The lugs"20 and ot the meniher l2 o. distance substantially the same se the thiclrness et the yew le, and it will he seen theft the lugs torni e space or channel therebetween, into which the jaw or member it ot' the loose tits.

Thos it will he observed in this construction that the point t end the hes-e tl may he reedily essemhled e,hy sliding the parte together, the space between the lugs 2@ end 2l permitting therehetween. lWhen the point and loose ere assembled, these lugs project over the outer edges or tacos et the jew le and toren rigid interlocking; means tor resistor preventing relative sidewise neovement ot the point and hose when subjected to leteral strain or shock.

The point and ere in the present 1nstence provided with a peir ot alined holt holes 22 and 23 respectively, through which snitahle holte 2t entend tor the purpose ot testening theparts together. lt will he seen that the fastening; holte tor the point and lease are located rearwardly ot the wedgeshaped nose 17, and since the lugs and 2l are also located adjacent thereto, thelatter positively serve to relieve the bolts 2t ot any strain due to transverse shocks or strains. The relationship therefore ot the fastening bolts 2t and the interlocking lugs 20 and 2l, which are all positioned in close proximity, is important in preventing the tendency ot the 'bolts to sheer, and hence hy virtue of this relationship the lugs 20 and 2leectively reinforce the fastening' holte.

ln the construction illustrated in Figs. 5 and 6, the point is also bifurcated to provide a pair of rearwardly extending jaws 26 and 27 forming a wedge-shaped recess therebetween for receiving the nose ot the hase. The jaws are connected together hy means of a central .web 28, and the lower jawis also provided with a rearward extension 27a. lln this instance., the upper jaw 26 is also beveled transversely at 26a, and the extensions 27 of the lower jaw has the side edges thereof tapered inwardly, as shown at 29. The base 30 in this `forno ot construction is also hifurcated to provide a lower jaw 32 and an upper jaw or shank 3l ot length` the members 31 and 32 thus being spaced apart to provide a seat for receiving the front edge ot the dipper hottoin t1. The rear portion of the lower jaw 32 of the hase is also tapered at 33 to correspond in size to the tapered end 29 ot the lower jaw ot the point.

The rear end of the extension 27 in the present instance is tapered or beveled transversely thereof at 3l, and the rear end of the lower jaw 32 of the base is provided with a transverse tapered shoulder 35 cooperating with the tapered portion 34 when the point and base are assembled.

Forwardly ot the tapered side edges 29 ot the lease to slide and dt ineen-es the extension 2in ere located e pair of inwardly or upwardly entendinglugs 36 ond 37. 'lhese lugs are preferably termed in substantially the seme manner es the lugs 26 and 2l hereinhetore described, and when the point and hase are eenihled the lugs 36 and 3? project over the outside tacos or edges of the inw 32 forwardly of the rearwardly tapered portion 33 thereof.

The hase 30 is provided with a tapered wedge-shaped nose t2, which extends into the wedge-shaped recess Jformed loy the jaws 26 and 27 ot the point, end this nose t2 is slotted to forni a recess 28a, into which the weh 28 extends. When the point and bese ere essemhled, the seme are secured together hy Ineens .ot suitable fastening bolts entending through alined holt holes 38 and 39 o the point and' hase respectively.

lt will he noted that the holts 2d not only secure the point and hase together, hut also serve to secure the tooth to the bottom l1 ot the clipper or shovel ttl.

l Heretotore it has frequently heen the practice, in order to interlock the point and hase of the tooth to provide one of the jaws of the point with a central lug, which ts.A

into a recess in the hase. Such a construction has in practice been found to have serious disadvantages because of the ditculty ci machining accurately the lug and recess, so as to exactly it without any relative movement of the point and base, and this construction has therefore been relatively expensive.

ln the present instance however, the side ylug-s 20 and 2l, or 36 and 37 may be readily cast on the side edges of the jaw, and since the jaw is formed anyway with a. width 'to tit the iuxtaposed part ot' the base of the tooth, the latter will snugly fit between the lugs, and hence the expense of machining lugs and recesses, as heretofore, is eliminated.

The importance ot this will be irrimediately understood, since it is a well known tact that it 1s an extremely dicult opera tion to machine manganese steel, and due to the character of the work required of dipper teeth, they are uniformly constructed ot mannose steel. i

llt is to be understood that by describing in detail herein any particular form, structure, or arrangement, it is not intended to limit the invention beyond the terms of the several claims or the requirements of the prior art.

Having thus .explained thenature of my said invention and described a way of constructing and using the seine, although without attempting to set forth all of the forms in which may he made, or all `of the modes of its use, l claim:

l. A diplper tooth comprising a hase and a point loi rcated to emhr seid hase, said l ing l lapping.

side edges of base and point having one a pair of lugs at the sides thereof overlapping the outer the other.

`2. A dipper tooth comprising a base and a point bifurcated to embrace said base, said base and point having one a pair of lugs formed outwardly from the plane of the side edges thereof and overlapping outer side faces of the other.

3. A dipper tooth point biurcated to form a pair oijaws, one of said jaws having an inwardly extending lug formed outwardly from a side edge thereof.

4. A dipper tooth comprising a base having a tapered nose and a rearwardly extendmember adapted to engage the dipper bottom, and a point having a lug overlapping a part of said member in rear of the nose andextending outside the plane of the side edge of said member.

5. A dipper tooth comp-rising a base having a tapered nose and a rearwardly extend- 'ing member adapted to engage the dipper bottom, and a `point having a pair of lugs overlapping and embracing therebetween said member, said lugs being spaced apart a distance as great as the greatest width of said member adjacent to the points of over- 6. A dipper tooth conprising a base and a point bifurcated .to embrace the base, and means for interlocking said base and point and. comprising a pair of lugs extending outside the plane of the outer sides of said base and point.

7. A dipper tooth comprising a base and a point bifurcated to embrace the base, and

means for interlocking said base and point and comprising a pair of lugs extending entirely outside the plane of the outer sides of sai base and point, and means adjacent to said lugs for securing the point and base together.

8. A dipper tooth comprising a base a point biiurcated to embrace said base,

and and bifurcated to form means for interlocking said base and point and comprising a pair of lugs spaced apart a distance as great as the said members ladjacent to t e lugs.

9. A dipper tooth comprising a point and a base having one a transverse tapered face and the other a tapered shoulder portion engaging said `face, and means for interlockin said baseand point and comprising a pair of lugs embracing the outer sides of one thereof.

10. .A dipper tooth comprising a base and a point each bifurcated to form a pair of rearwardly extending jaws located in juxtaosition, and means for interlocking said jaws against prising a pair of lugs extending outside the plane of the side ed es of said jaws.

11. A dipper toot comprising a base and a point each bifurcated to form a pair o rearwardly extending jaws located in juxtaposition, said jaws having lugs engaging the same and embracing the side edges of one thereof, and a bolt extending through said said lugs.

tooth comprising a point a pair of jaws, a base cooperating therewith, and means for interlocking said point and base and comprising a pair of lugs, one thereof overlapping a jaw and a part of the base and extending outside the plane ofthe side edges of the jaw and base at the point of overlapping.

13. A dipper tooth comprising a base member and a point member adapted to be joined to ether, and means for interlocking said mem rs against relative movement and comprising a pair of lugs, each lug projecting outwardly from the ,edge of one of the members and overlapping a non-recessed portion of the other member.

Signed at 30 Church St., New York, N. Y., this 15th day of February, 1923.

EDWARD Louis PEMBERTON.

jaws adjacent to 12. A dipper greatest width of relative movement and com.v

fles 

